'use strict';

module.exports = index;

const path = require('path')
const semver = require('semver')
const colors = require('colors/safe')
const userHome = require('user-home')
const pathExists = require('path-exists').sync
const commander = require('commander')
const log = require('@lio-imooc-cli-dev/log')
const init = require('@lio-imooc-cli-dev/init')
const exec = require('@lio-imooc-cli-dev/exec')

const constant = require('./const')
const pkg = require('../package.json')

let args

const program = new commander.Command()

async function index() {
    try {
        await prepare()
        registerCommand()
    } catch(e) {
        log.error(e.message)
        if (process.env.LOG_LEVEL === 'verbose' || program.debug) {
            console.log(e)
        }
    }
}

function registerCommand() {
    // lio-imooc-cli-dev init test-project --targetPath /xxx
    program
        .name(Object.keys(pkg.bin)[0])
        .usage('<command> [options]')
        .version(pkg.version)
        .option('-d, --debug', '是否开启调试模式', false)
        .option('-tp, --targetPath <targetPath>', '是否指定本地调试文件路径', '')

    // lio-imooc-cli-dev init test-project --force
    program
        .command('init [projectName]')
        .option('-f, --force', '是否强制初始化项目')
        .action(exec)

    // lio-imooc-cli-dev --debug
    // 开启debug模式
    program.on('option:debug', function() {
        if (program.debug) {
            process.env.LOG_LEVEL = 'verbose'
        } else {
            process.env.LOG_LEVEL = 'info'
        }
        log.level = process.env.LOG_LEVEL
        log.verbose('test11')
    })

    // 指定targetPath
    program.on('option:targetPath', function () {
        // program.targetPath = D:/software/Git/xxx
        process.env.CLI_TARGET_PATH = program.targetPath
    })

    // 未知命名监听
    program.on('command:*', function (obj) {
        const availableCommands = program.commands.map(cmd => cmd.name())
        console.log(colors.red('未知的命名：' + obj[0]))
        if (availableCommands.length > 0) {
            console.log(colors.red('可用命令：' + availableCommands.join(',')))
        }
    })

    // 没有命令输入，打印出所有命令
    if (process.argv && process.argv.length < 1) {
        program.outputHelp()
        console.log()
    }
    program.parse(program.argv)
}

async function prepare () {
    checkPkgVersion()
    checkNodeVersion()
    checkRoot()
    checkUserHome()
    // checkInputArgs()
    checkEnv()
    await checkGlobalUpdate()
}

// 检查是否需要更新
async function checkGlobalUpdate() {
    // 1、获取当前版本号和模块名
    // 2、调用npm API
    // 3、提取所有版本号，比对哪些版本号是大于当前版本号
    // 4、获取最新的版本号，提示用户更新到该版本

    const currentVersion = pkg.version
    const npmName = pkg.name

    const { getNpmSemverVersion } = require('@lio-imooc-cli-dev/get-npm-info')
    const lastVersion = await getNpmSemverVersion(currentVersion, npmName)
    if (lastVersion && semver.gt(lastVersion, currentVersion)) {
        log.warn(colors.yellow(`请手动更新 ${npmName}，当前版本：${currentVersion}，最新版本：${lastVersion}
        更新命令：npm install -g ${npmName}`))
    }
}

function checkEnv () {
    const dotenv = require('dotenv')
    const dotenvPath = path.resolve(userHome, '.env')

    if (pathExists(dotenvPath)) {
        dotenv.config({
            path: dotenvPath
        })
    }
    createDefaultConfig()
    // log.verbose('环境变量', process.env.CLI_HOME_PATH)
}

function createDefaultConfig () {
    const cliConfig = {
        home: userHome
    }
    if (process.env.CLI_HOME) {
        cliConfig['cliHome'] = path.join(userHome, process.env.CLI_HOME)
    } else {
        cliConfig['cliHome'] = path.join(userHome, constant.DEFAULT_CLI_HOME)
    }
    process.env.CLI_HOME_PATH = cliConfig.cliHome
}

// function checkInputArgs() {
//     const minimist = require('minimist')
//     args = minimist(process.argv.slice(2))
//     console.log(args)
//     checkArgs()
// }

// function checkArgs () {
//     if (args.debug) {
//         process.env.LOG_LEVEL = 'verbose'
//     } else {
//         process.env.LOG_LEVEL = 'info'
//     }
//     log.level = process.env.LOG_LEVEL
// }

function checkUserHome() {
    if (!userHome || !pathExists(userHome)) {
        throw new Error(colors.red('当前登录用户主目录不存在！'))
    }
}

function checkRoot () {
    const rootCheck = require('root-check')
    rootCheck()
}

function checkNodeVersion () {
    // 第一步：获取当前node版本号
    const currentVersion = process.version
    // 第二步：比对最低版本号
    const lowestVersion = constant.LOWEST_NODE_VERSION
    if (!semver.gte(currentVersion, lowestVersion)) {
        throw new Error(colors.red(`lio-imooc-cli 需要安装v${lowestVersion}以上版本的Node.js`))
    }
}


function checkPkgVersion() {
    log.info('cli', pkg.version)
}
